The influence of an electronegative gas admixture on the intense E-beam transport and induced plasma currents in argon

Author

Bondar, Yuriy F. ; Janovski, Amdrzey J. ; Klimov, Vladimir I. ; Mkheidze, Guram P. ; Savin, Alexei A.

Author_Institution

Gen. Phys. Inst., Moscow, Russia

Volume

21

Issue

4

fYear

1993

fDate

8/1/1993 12:00:00 AM

Firstpage

353

Lastpage

357

Abstract

The propagation of an electron beam, with electron energy ~1.2 MeV, beam current ~8 kA, and an induced plasma current is investigated using a metal drift tube ~0.5 m long filled with argon at atmospheric pressure. The behavior of electron concentration and electron temperature was calculated for several concentrations of the SF₆ admixture. The comparison of the results of the experiments and numerical calculations shows that the dropping of plasma current when electronegative gas is added is due to the electron attachment to the SF ₆ molecules. The results of the experiment and the calculations provide the evidence of at least three mechanisms responsible for the increase of the REB transport efficiency when electronegative gas is present

Keywords

argon; electron attachment; electronegativity; plasma collision processes; plasma impurities; plasma transport processes; plasma-beam interactions; 1.2 MeV; 1.8 kA; Ar; SF₆; SF₆-Ar; beam current; electron attachment; electron beam propagation; electron concentration; electron energy; electron temperature; electronegative gas admixture; induced plasma currents; intense E-beam transport; metal drift tube; relativistic electron beam transport efficiency; Anodes; Argon; Bonding; Current measurement; Electron beams; Monitoring; Particle beam injection; Plasma density; Plasma measurements; Plasma transport processes;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.234560

Filename

234560